The Quantum Storage Systems QSB216CL Clear-View Series Store-More 6" Shelf Bin is a durable high density polypropylene bin that has a wide hopper style front for complete access to contents of bin. This water-proof bin also features a molded-in label holder and built-in rear hang-lock, which allows the bin to tilt out for complete access when on shelving. The Quantum Storage Systems QSB216CL Clear-View Series Store-More 6" Shelf Bin is also corrosion free and has reinforced edges for added strength.